CN1518811A - Cross media error protection method and system - Google Patents
Cross media error protection method and system Download PDFInfo
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- CN1518811A CN1518811A CNA028123581A CN02812358A CN1518811A CN 1518811 A CN1518811 A CN 1518811A CN A028123581 A CNA028123581 A CN A028123581A CN 02812358 A CN02812358 A CN 02812358A CN 1518811 A CN1518811 A CN 1518811A
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- media stream
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- Computer Networks & Wireless Communication (AREA)
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- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Quality & Reliability (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
A system and method for providing cross media error protection for multimedia data. The cross media error protection comprises: a packaging system for packaging the multimedia data into discrete packets, wherein each packet includes a plurality of fields, and wherein data segments from each of the media streams are placed into different ones of the plurality of fields; and an insertion system for inserting error protection data into one of the plurality of fields in each packet. In addition, a size of each of the plurality of fields may be made proportional to the size of each of the plurality of media streams over a time interval.
Description
The present invention relates to the error protection scheme, more particularly, relate to multimedia data stream and stride medium error protection system and method.
The error protection technology is used to protect electronic data and information to avoid mistake.Can protected data type may comprise for example simple data file, multi-medium data (for example, video and audio frequency) or webpage.Mistake mainly takes place in transmission course, but also may be by for example causing to memory write or from other activities of memory read data.The error protection scheme comes into force by the redundancy that increases data.Redundancy can be used for EDC error detection and correction.The validity of given error protection scheme generally depend on add redundant amount.
Protect the vital field that becomes to comprise multi-medium data and web content, both generally comprise media stream.For example, video frequency program may comprise one or more video, audio frequency and word flow.Similarly, webpage may comprise audio frequency, video and embedding lteral data wherein.In general, the length of various Media Streams or bandwidth are different, and video flowing generally takies the bandwidth of vast scale, then are audio frequency, are exactly thereafter literal.In the present invention, term " multimedia " should refer to any content that comprises a plurality of Media Streams.
In the information environment of today, the data that are made of a plurality of Media Streams usually send to the device with different abilities simultaneously.Like this, for example, having the computer of audio frequency, video and literal display capabilities or TV (television set) can decode and show all stream.On the contrary, audio player is only to the audio stream decoding, and the cell phone or the PDA(Personal Digital Assistant) that have only literal to show can only be decoded to word flow.Therefore, in such environment, protect all single rheologies to get no less important.
The method of traditional this content of protection is protected each Media Stream independently, and the bit groupings that is about in each Media Stream is independently assembled, and the redundant bit of some is added in each grouping.Create many video packets, audio packet and literal grouping like this, each grouping all has their redundancy or error checking and correction bit.The problem of this independent protective is that a transmission error may destroy a Media Stream fully, word flow for example, thus PDA user " is suffered from hunger ".
The example of this scheme as shown in Figure 2, Fig. 2 has described a plurality of Media Streams 30, each Media Stream is assembled with redundant bit R.Suppose in given interval, to generate 80 bits of stream 1 (video V), 32 bits of stream 2 (audio A) and 16 bits that flow 3 (literal T).In the example of describing in Fig. 2, each stream resolves into the 20 bits block length of (16 information bits add 4 redundant bit R again), and 25% error protection redundancy so just is provided.For example, 16 video bits 32 are assembled with 4 redundant bits 34, or the like.In this example, 5 video packets are arranged, two audio packet and a literal grouping, they are all protected with redundant bit R independently.
Now, suppose that transmission medium introduced mistake in one of these groupings, and mistake makes redundant information be not enough to correct mistake.If this mistake happens to be in the grouping of carrying text message 35, the information that is associated with this time durations has just been lost fully so.Because literal grouping 35 is lost fully, resemble this device that can only display text information of PDA and show with regard to free of data in this period.Therefore, PDA user can receive with regard to no information in this period, and the user of PC or audio player still can receive and handle other stream.
Therefore, have the needs that a kind of like this system is provided: this system can reduce the risk that data are lost fully or free of data is supplied with in having the environment of a plurality of Media Streams.
By providing part with different media flows to be combined to the medium error protection system of striding in each grouping, the present invention has overcome above-described and other problem.The amount of inserting each Media Stream type of each grouping can be proportional with the total length of different media flows.
In first aspect, the invention provides the medium error protection system of striding of the multi-medium data that is used to have a plurality of dissimilar Media Streams, this system comprises: the package system that is used for multi-medium data is assembled into discrete packets, wherein, each grouping comprises a plurality of fields, and is placed in one of a plurality of fields from the data segment of each Media Stream; And the insertion system that is used for inserting the error protection data in one of a plurality of fields of each grouping.
In second aspect, the invention provides encoder, be used to assemble multi-medium data with first and second type of media stream, described encoder comprises: the device that multi-medium data is assembled into discrete packets, wherein, each grouping comprises first field of preserving one section first kind medium, preserves second field of one section second type of media stream, and the 3rd field of preserving the error protection data; Wherein, the length of the length of first and second fields and first and second Media Streams is proportional.
In the third aspect, the invention provides decoder, be used to multi-medium data fractionation group with first and second dissimilar Media Streams, described decoder comprises: the device that is used for reading from discrete packets multi-medium data, wherein, each grouping comprises first field that has from the fragment of first Media Stream, has second field from the fragment of second Media Stream, and the 3rd field with error protection data; Wherein, the length of the length of first and second fields and first and second Media Streams is proportional.
In fourth aspect, the invention provides and be used to provide multi-medium data to stride the method for medium error protection, this method comprises the steps: to receive the multi-medium data with a plurality of Media Streams, the type difference of each Media Stream; Determine the length of each Media Stream; Multi-medium data is assembled into a plurality of discrete packets, and wherein, each discrete packets comprises the data segment from each Media Stream, and the length of the length of each grouping and each Media Stream is proportional; And the error protection data are inserted each grouping.
Aspect the 5th, this aspect provides to be stored in and is used to provide multi-medium data to stride the program product of medium error protection on the recordable media, this program product comprises: be configured the program code that is used to receive the multi-medium data with a plurality of Media Streams, each Media Stream type difference; Be configured the program code that is used for determining each Media Stream length; Be configured the program code that is used for multi-medium data is assembled into a plurality of discrete packets, wherein, each discrete packets comprises the data segment from each Media Stream, and the length of the length of each grouping and each Media Stream is proportional; And be configured the program code that is used for the error protection data are inserted each grouping.
To be described same numeral indication same unit in the accompanying drawing subsequently in conjunction with the accompanying drawings to best illustration embodiment of the present invention; And:
Fig. 1 describes the block diagram of striding the media protection system according to most preferred embodiment of the present invention.
Fig. 2 describes to provide the typical case of error protection to assemble scheme.
Fig. 3 describes according to the medium assembling scheme of striding of the present invention.
With reference now to Fig. 1,, wherein shows the medium error protection system 10 of striding.System 10 comprises receiving multimedia data 26, and data 26 is become the encoder 12 of a plurality of discrete packets 28 together with other error protection digital coding.Grouping 28 is received by decoder 20 by transmission channel, and 20 pairs of groupings of decoder are decoded and its converting multimedia data 29.As mentioned above, the term multimedia may comprise any content that comprises a plurality of data flow.
In most preferred embodiment, grouping is fixed handles the ratio deterministic process of respectively dividing into groups as described below than system 16.At first, receiving data stream, and the length of each Media Stream in definite particular time interval.Then, the relative scale (being length ratio) of computing medium stream.At last, distribute the grouping field length of each Media Stream and the grouping field length of redundant bit.Like this, suppose, receive the multi-medium data of second Media Stream (for example ratio is 2: 1) of second categorical data of first Media Stream of first kind data and 500 bits with 1000 bits through a time interval.Further hypothesis will be created discrete packets, per minute group 20 bits, and wherein each grouping has 5 bit redundancies (like this, staying 15 bit media datas).Use total ratio of these two Media Streams, will be used to preserve first field, and be used to preserve second field from 5 bits of second Media Stream to each packet allocation from 10 bits of first Media Stream.Preserving the 3rd field of 5 bit redundant bits will distribute in the same old way.Should be understood that grouping ratio division methods as described herein just for the purpose of demonstration, other method can be used equally, and falls within the scope of the present invention.For example, the field length of each grouping can be " hard coded ", and the length of each field just need not dynamically be determined based on the length of each stream like this.In addition, can estimate the length of each Media Stream based on typical requirement.
In case determined field length, package system 16 then correspondingly divides into groups to Media Stream, and adds the error protection bit by error protection system 18.The system and the scheme of adding error protection are known in the art.Can transmit the grouping 28 of generation then, perhaps handle with other mode, and by decoder 20 decodings.Whether decoder 20 comprises error checking and correcting system 22, is used to check the error protection bit, intact with the grouping of determining to receive.Error checking and correcting system 22 can also be corrected the mistake in the grouping.Then, split 24 pairs of media data bit fractionation groups of group system, and utilize the fixed ratio scheme of grouping to rebuild multimedia data stream 29 than system's 16 designs from each field in each grouping.Decide dynamically to determine under the situation of field length based on stream length that field length can be used predetermined agreement to send to and split group system 24 than system 16 in grouping.
Referring now to Fig. 3, show a kind of exemplary medium assembling scheme of striding among the figure, at be to have and a component group 28 of the same hypothesis of hypothesis as described in Figure 2, be to require 25% redundancy in the given interval, wherein produce the stream 1 (video V) of 80 bits, the stream 2 (audio A) of 32 bits and the stream 3 (literal T) of 16 bits.Yet in this embodiment, each grouping comprises the data from each Media Stream.And the data volume that is contained in each stream in each grouping is proportional with the length of video, audio frequency and word flow respectively, is 5: 2: 1 in this case.Be similar to situation as described in Figure 2, generate 8 groupings that each length is 20 bits.Yet, in this case, be 4 fields of each packet allocation, wherein comprise first section 38 of 10 bit video information, second section 40 of 4 bit audio, the 4th section 44 of the 3rd section 42 and 4 bit redundant information of 2 bit literal.
Now, suppose transmission medium introduce with at the described same mistake amount of Fig. 2, that is, one of grouping has been lost fully, the medium error protection scheme of striding shown in Figure 3 guarantees that in the time interval device can not have data.Specifically,, therefore only lost the seldom word flow of part, still the PDA device can display text information, although some losses are arranged because the data in each grouping comprise the fragment of all Media Streams.Therefore, this embodiment guarantees that under the situation of packet loss, data degradation is disperseed, and is shared by all Media Streams.Therefore, this medium error protection of striding is avoided owing to transmission error single stream being lost fully, thereby uses the user of literal and other " carefully " stream can not have data.
Understand that system as described herein, function, method and module can use the combination of hardware, software or hardware and software to realize.They can be realized with computer system or other device of any kind that is suitable for carrying out method as described herein.Typical combination of hardware can be the general-purpose computing system with computer program, and this computer program is when loading and carry out, and the control computer system is carried out method as described herein.Perhaps, can utilize special-purpose computer, it comprises the specialized hardware of carrying out one or more functional task of the present invention.The present invention also can be embedded in the computer program, and this computer program comprises all characteristics that allow to realize method as described herein and function, and can carry out these methods and function after being loaded into computer system.Computer program in this context, software program, program, program product or software mean be intended to make have information processing capability system directly or after following two steps, carry out any form of expression of any language, code or symbol of the instruction set of specific function: (a) be transformed into another kind of language, code and symbol; And/or (b) with different concrete form reproductions.
For the purpose of illustration and description, the relevant most preferred embodiment of the present invention in front is described.They are not for exhaustive, or limit the invention to disclosed precise forms, obviously, according to above-mentioned argumentation, many modifications and variations are obvious for those skilled in the art, are intended to it is included within the definite scope of the present invention of claims.
Claims (16)
1. medium error protection system (10) of striding that is used to have the multi-medium data of a plurality of dissimilar Media Streams, described system comprises:
Package system (14) is used for described multi-medium data is assembled into discrete packets (28), and wherein each grouping comprises a plurality of fields, and the data segment in wherein said each Media Stream is placed in one of described a plurality of fields; And
Insertion system (18) is used for inserting error protection data (44) in one of described a plurality of fields of each grouping.
2. the medium error protection system of striding as claimed in claim 1 is characterized in that the length of each Media Stream in the length of each field in described a plurality of field and the described a plurality of Media Stream is proportional.
3. the medium error protection system of striding as claimed in claim 1, the length that it is characterized in that each field in described a plurality of field is with the predetermined ratio setting.
4. the medium error protection system of striding as claimed in claim 1 is characterized in that described a plurality of Media Stream selects from the group that audio frequency, video, figure and literal constitute.
5. the medium error protection system of striding as claimed in claim 1 is characterized in that also comprising decoder (20), is used for described discrete packets (28) decoding to multi-medium data.
6. an encoder (12), be used to assemble multi-medium data with first and second type of media stream, described encoder comprises device (14), be used for described multi-medium data is assembled into discrete packets, wherein each grouping comprises first field that is used to preserve one section described first kind medium, be used to preserve second field of one section second type of media stream, and the 3rd field that is used to preserve the error protection data;
The length of the length of wherein said first and second fields and described first and second Media Streams is proportional.
7. encoder as claimed in claim 6 is characterized in that the described first and second Media Stream types select from the group that audio frequency, video, literal and figure constitute.
8. a decoder (20), be used to multi-medium data fractionation group with first and second dissimilar Media Streams, described decoder (20) comprises the device (24) that is used for reading from discrete packets multi-medium data, wherein each grouping comprises first field with one section described first Media Stream, have second field of one section described second Media Stream, and the 3rd field with error protection data;
The length of the length of wherein said first and second fields and described first and second Media Streams is proportional.
9. decoder as claimed in claim 8 is characterized in that the described first and second Media Stream types select from the group that audio frequency, video, literal and figure constitute.
10. a method is used to provide multi-medium data to stride the medium error protection, and described method comprises:
-reception has the multi-medium data of a plurality of Media Streams, described each media stream type difference;
-determine the length of each Media Stream;
-described multi-medium data is assembled into a plurality of discrete packets (28), wherein each discrete packets comprises the data segment from each described Media Stream, and the length of the length of each grouping and each Media Stream is proportional; And
-error protection data (44) are inserted each grouping.
11. method as claimed in claim 10 is characterized in that each described discrete packets (28) length is identical.
12. method as claimed in claim 10 is characterized in that also comprising the step of transmitting discrete grouping (28).
13. method as claimed in claim 12 is characterized in that also comprising with decode the back step of described a plurality of Media Stream (29) of described discrete packets.
Be used to provide multi-medium data to stride the medium error protection on the recordable media 14. a program product (14), described program product are stored in, described program product comprises:
-program code is configured and is used to receive the multi-medium data with a plurality of Media Streams, wherein each described Media Stream type difference;
-program code (16) is configured and is used for determining each Media Stream length;
-program code (14) is configured and is used for described multi-medium data is assembled into a plurality of discrete packets (28), and wherein each discrete packets comprises the data segment from each described Media Stream, and the length of the length of each grouping and described each Media Stream is proportional; And
-program code (18) is configured and is used for the error protection data are inserted each grouping.
15. program product as claimed in claim 14 is characterized in that the interior at interval at the fixed time length of determining described each Media Stream.
16. program product as claimed in claim 14 is characterized in that estimating the length of described each Media Stream.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/885,698 US6898758B2 (en) | 2001-06-20 | 2001-06-20 | Cross media error protection method and system |
| US09/885,698 | 2001-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1518811A true CN1518811A (en) | 2004-08-04 |
Family
ID=25387503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA028123581A Pending CN1518811A (en) | 2001-06-20 | 2002-06-17 | Cross media error protection method and system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6898758B2 (en) |
| EP (1) | EP1402674A1 (en) |
| JP (1) | JP2004537199A (en) |
| KR (1) | KR20030027959A (en) |
| CN (1) | CN1518811A (en) |
| WO (1) | WO2002103955A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101273603B (en) * | 2005-09-27 | 2013-06-19 | 英特尔公司 | Mechanisms for data rate improvement in a wireless network |
| CN107430545A (en) * | 2015-01-29 | 2017-12-01 | 信号公司 | The real-time processing of the data flow received from instrumentation software |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1832115A1 (en) * | 2004-12-20 | 2007-09-12 | Freescale Semiconductor Inc. | Broadcasting of textual and multimedia information |
| KR100846787B1 (en) * | 2006-02-15 | 2008-07-16 | 삼성전자주식회사 | Method and apparatus for importing transport stream |
| JP4356742B2 (en) | 2006-12-25 | 2009-11-04 | ソニー株式会社 | Data communication system, data transmission apparatus, and data transmission method |
| EP2201707A4 (en) * | 2007-09-20 | 2011-09-21 | Visible World Corp | Systems and methods for media packaging |
| FR3041850B1 (en) * | 2015-09-30 | 2018-05-25 | Vogo | METHOD FOR ENCODING VIDEO STREAMS BASED ON IMAGE GROUP (GOP) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544328A (en) * | 1991-10-31 | 1996-08-06 | At&T Bell Laboratories | Coded modulation with unequal error protection |
| US5805762A (en) * | 1993-01-13 | 1998-09-08 | Hitachi America, Ltd. | Video recording device compatible transmitter |
| US5453987A (en) * | 1994-02-15 | 1995-09-26 | The Mitre Corporation | Random access protocol for multi-media networks |
| TW358277B (en) * | 1996-05-08 | 1999-05-11 | Matsushita Electric Ind Co Ltd | Multiplex transmission method and system, and audio jitter absorbing method used therein |
| US5920581A (en) * | 1996-05-31 | 1999-07-06 | Vtech Communications, Ltd. | Error detection method and apparatus for digital communication data packets |
| US5844885A (en) * | 1996-06-11 | 1998-12-01 | Qualcomm Incorporated | Method and apparatus of providing bit count integrity and synchronous data transfer over a channel which does not preserve synchronization |
| JPH1174868A (en) | 1996-09-02 | 1999-03-16 | Toshiba Corp | Information transmission method, coder/decoder in information transmission system adopting the method, coding multiplexer/decoding inverse multiplexer |
| GB9621774D0 (en) * | 1996-10-18 | 1996-12-11 | Northern Telecom Ltd | Digital communications system |
| KR100560712B1 (en) | 1997-06-19 | 2006-03-16 | 가부시끼가이샤 도시바 | Information data multiplexing transmission system, multiplexer and demultiplexer used therefor, and error correcting encoder and decoder |
-
2001
- 2001-06-20 US US09/885,698 patent/US6898758B2/en not_active Expired - Fee Related
-
2002
- 2002-06-17 JP JP2003506140A patent/JP2004537199A/en active Pending
- 2002-06-17 EP EP02735876A patent/EP1402674A1/en not_active Withdrawn
- 2002-06-17 WO PCT/IB2002/002314 patent/WO2002103955A1/en not_active Application Discontinuation
- 2002-06-17 KR KR10-2003-7002458A patent/KR20030027959A/en not_active Application Discontinuation
- 2002-06-17 CN CNA028123581A patent/CN1518811A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101273603B (en) * | 2005-09-27 | 2013-06-19 | 英特尔公司 | Mechanisms for data rate improvement in a wireless network |
| CN107430545A (en) * | 2015-01-29 | 2017-12-01 | 信号公司 | The real-time processing of the data flow received from instrumentation software |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1402674A1 (en) | 2004-03-31 |
| WO2002103955A1 (en) | 2002-12-27 |
| JP2004537199A (en) | 2004-12-09 |
| KR20030027959A (en) | 2003-04-07 |
| US6898758B2 (en) | 2005-05-24 |
| US20020199148A1 (en) | 2002-12-26 |
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